In libraries, marketing is a big thing - how do we get that user to come in the door, use our online database, check out a book, etc? But they don't necessarily teach us that in grad school.
So I've subscribed to a daily email of press release tips (89 tips in total). So far, I've only read one tip, so we'll see how useful it is. The tips are nice and short (I'm a Millennial, my attention wanders after about 3 minutes...).
Check out the Publicity Hound's 89 Press Release Tips if you are interested. It's not geared towards libraries, but rather towards anyone writing press releases.